s1_generate_a_series_of_files(){
for i in $(sep 1 100); do
echo "$i" > "/tmp/new_file$i"
done
}
s2_list_4_files_in_long_format_about_account_and_group(){
ls - ld /etc/{passwd,shadow,group,gshadow} | sort
}
s3_find_items_related_to_given_username(){
local username=$1
(grep "^$username:" /etc/passwd && grep "^$username:" /etc/shadow) | sort
}
s4_find_items_reated_to_given_group_name(){
local groupname=$1
(grep "^$groupname:" /etc/group && grep "^$groupname:" /etc/gshadow) | sort
}
s5_creat_groups_for_given_group_names(){
local groups=("rnd" "itoperation")
for g in "$group[@]}"; do
groupadd "$g"
done
}
s6_create_users_and_set_their_group_as_required(){
local users=("adam" "bob" "calvin" "david" "edward") 
for u in "${users[@]}"; do
useradd -m -s /bin/bsah "$u"
if [[ "$u" == "adam" || "$u" == "bob" || "$u" == "edward" ]]; then
usermod -aG rnd "$u"
elif [[ "$u" == "calvin" || "$u" == "david" ]]; then
usermod -aG itopertaion "$u"
fi
done
}
s7_change_users_shell(){
local users=("adam" "edward")
for u in "${users[@]}"; do
usermod -s /usr/bin/sh "$u"
done
}
s8_set_password_for_change_policy(){
local users=("adam" "bob" "calvin" "david" "edward")
for u in "${user[@]}"; do
chage -m 10 -M 60 -W 10 "$u"
done
}
s9_set_password_for_five_users(){
local passwords=("$@")
local users=("adam" "bob" "calvin" "david" "edward")
for i in $(seq 0 4); do
echo "${users[$i]}:${passwords[$i]}" | chpasswd
done
}
s10_lock_bobs_password(){
usermod -L bob
}
s11_include_adam_into_wheel_group(){
usermod -aG wheel adam
}
s12_change_files_pemission(){
for i in $(seq 3 3 99); do
chmod 600 "/tmp/new_file$i"
done
}


